Stroomlijnen

Somewhere in a Dutch business park stands a bakery that cannot get an oven connected. Down the road, a school waits for a heat pump it is not allowed to plug in, and a logistics firm has parked its electric trucks because the charger would tip the local substation over the edge. None of this is a power shortage. There is plenty of electricity. There is simply no room left in the wires.

The Dutch call it netcongestie, and it may be the most consequential boring word in the country. The map of the Netherlands, colored by grid capacity, has turned almost entirely red-hatched: in most regions, new large consumers or producers join a waiting list. The queue in front of the grid has grown into something resembling a second, invisible energy system — one that exists only on paper.

Read that chart again, because the units are doing something outrageous. The country's all-time peak demand is on the order of 18 to 20 gigawatts. The amount of requested capacity sitting in the queue is now several multiples of that. Some of it is speculative double-counting — the same data center shopping in three provinces — but even discounted, the ambition waiting at the gate dwarfs the machine behind it.

How a rich country runs out of wires

It is tempting to call this a planning failure, and partly it is. But mostly it is arithmetic. The grid we have was sized for the old world of the first essay: a few dozen large power plants pushing electricity one way, toward predictable consumers. The new world inverted every assumption at once.

• Solar arrived decentralized — two million rooftops feeding power backwards through cables laid for consumption.
• Electrification arrived everywhere simultaneously — heat pumps, EVs, hydrogen pilots, industry swapping gas furnaces for electric boilers.
• And everything peaks at the same hour, because the sun and the dinner rush do not negotiate.

A cable takes a year to lay; the permit for it takes seven. That, in one sentence, is the crisis.

The response is genuinely enormous — investment has roughly quadrupled since 2019, and the operators now hire faster than the army. But you cannot hire your way past physics and permitting, so the more interesting story is the improvisation happening inside the constraint:

1. Flexible contracts — pay less, agree to be curtailed at the worst 100 hours of the year. Congestion, it turns out, is mostly a few winter evenings.
2. Cable pooling — wind and solar sharing one connection, because they rarely peak together.
3. Energy hubs — business parks pooling their capacity behind a single point, trading among themselves like a miniature market.
4. Batteries at substations — absorbing the solar noon, releasing it into the dinner peak.

The grid of the twentieth century sold certainty: always on, any amount, any time. The grid of the twenty-first sells something more interesting — a negotiation.

The waiting list will not clear this decade; the operators say so themselves. What will change is the meaning of a connection. The flat, infinite socket is becoming a time-shaped, price-shaped agreement — and the companies learning to dance with the grid, rather than lean on it, are quietly acquiring the skill that the next essay shows in its purest form: what happens on a sunny Sunday, when the polder produces more power than it knows what to do with.

Figures are approximate, compiled from TenneT, Netbeheer Nederland and ACM publications; the queue numbers are indicative of scale rather than precise.

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There is a number that quietly crossed a line while nobody was watching. Somewhere in 2024, for the first time since the age of steam, more than half of the electricity produced in the Netherlands came from renewable sources. No ceremony, no headline that stuck. Just wind, sun, and a grid that had been rebuilt underneath us while we argued about other things.

To see how strange this is, you have to remember where we started. In 2015 the Dutch power system was, bluntly, a fossil machine. Coal and gas together produced roughly four of every five kilowatt-hours. Wind was a rounding error with good publicity. Solar barely registered.

Watch the violet band. That is coal — and it is a controlled demolition. The Netherlands decided in 2019 that coal power ends by 2030, and the plants have been winding down ever since, with a brief encore during the 2022 gas crisis. Gas is a slower story: still the backbone on a windless winter evening, but visibly retreating from its 2019 peak.

And then the two insurgents. Wind, first onshore and then — decisively — at sea, where the shallow North Sea turned out to be one of the best places on Earth to plant turbines. And solar, which did something almost absurd: a country famous for grey skies became the European leader in solar panels per inhabitant.

The curve is not slowing down. It is the compound interest of a thousand separate decisions: subsidy schemes that turned into auctions, auctions that turned into zero-subsidy bids, rooftops that turned into power plants.

None of this means the work is done. The last half is the hard half: the windless week in January, the November evening when the whole country cooks dinner at once, the storage we have barely begun to build. The fossil bands in that first chart are thinner, but they are load-bearing.

Still — stand back and look at the shape of the thing. A small, dense, cloudy country rebuilt the majority of its power supply in about as much time as it takes to plan a motorway. The next essays in this series are about what that victory broke, and what comes after it: the grid that filled up, and the duck that landed in the polder.

Figures are approximate and drawn from CBS (Statistics Netherlands) production statistics; 2025 is a provisional estimate.

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On a clear Sunday in May, around one o'clock in the afternoon, something economically surreal happens in the Netherlands: electricity becomes worth less than nothing. The price on the exchange dips below zero, and anyone still feeding power into the grid is, technically, paying for the privilege. The country with the grey skies and the umbrella reflex has managed to produce too much sunshine.

How we got here is a story of quiet, suburban enthusiasm. No megaproject, no ribbon-cutting — just some two million households, one roof at a time, encouraged by a generous net-metering scheme, until the Netherlands led Europe in solar capacity per inhabitant.

Twenty-seven gigawatts of panels in a country that peaks below twenty. You can already feel the plot twist coming.

Meet the duck

Grid operators plot demand minus solar — the "net load" that everything else must supply. In California they noticed this curve sagging at noon and rearing up at sunset, and someone saw a duck in it. The duck has since migrated to the polder, and here it found ideal habitat: dense rooftop solar, and everyone's dinner at six.

You can raise the duck yourself. The blue line below is demand on a clear spring day. The orange line is what remains after solar. Drag the slider through the last decade of Dutch history — from almost no solar to today's fleet — and watch the afternoon collapse.

Two things about that picture should widen your eyes. The first is the negative belly — hours of literal surplus. The second, more dangerous one is the neck: the near-vertical climb into the evening, when the sun clocks out just as the country comes home. Gas plants that spent the afternoon unemployed must now sprint from zero. Flexibility, not energy, becomes the scarce commodity.

The market has been keeping score of this new reality:

What eats a duck?

Nothing about the duck is a malfunction — it is what success looks like before the second act is built. The surplus is an invitation, and the bids are already in: batteries that buy the belly and sell the neck, and are being bolted to substations at record pace; electric boilers and future electrolysers that see free noon power as feedstock; car parks full of EVs that could soak up an entire afternoon of sunshine; and, most simply, prices that finally reach households, nudging the dishwasher toward one o'clock.

The first decade of Dutch solar was about making energy. The second will be about making timing.

The net-metering scheme that hatched all this ends in 2027, and with it the fiction that the grid is a free battery. What replaces it — home storage, smart tariffs, neighbourhood trading — will decide whether the duck stays a curiosity of spring Sundays or becomes the organizing principle of the whole system. Either way, the polder has a new bird, and it is not leaving.

Figures are approximate; the day curve is stylized for a cloudless spring day, not a specific date.

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Every Dutch energy story stands on top of an older one, and the older one is a hole in the ground near Slochteren. Discovered in 1959 under the beet fields of Groningen, it turned out to be the largest natural gas field in Europe — around 2,800 billion cubic metres, a national lottery ticket buried at three kilometres' depth.

The gift arrived at a convenient hour. Within fifteen years nearly every Dutch home was connected to Groningen gas; the state earned hundreds of billions of guilders and euros, and the field quietly co-financed the welfare state, the motorways, the polders' pumps. Dutch gas even gave economics a term of caution — Dutch disease — for what a windfall does to the rest of an economy.

For half a century the only question was how fast to sell it. Then, on the evening of 16 August 2012, the ground near the village of Huizinge moved — magnitude 3.6, the strongest of what were by then hundreds of induced earthquakes. Small numbers by world standards; not small under brick farmhouses never built for any earthquake at all. Tens of thousands of damage claims later, the field's fate stopped being a question of geology or economics and became one of trust.

Look again at the right side of the curve. That late peak around 2013 — 54 billion cubic metres in the very year the state's own supervisor first urged restraint — became a national scandal in slow motion. What follows is the cliff: production capped, then halved, then halved again, each step forced by another tremor, another report, another courtroom. In April 2024 the field was closed for good, with roughly a fifth of its treasure deliberately left in the ground — likely the largest sum of money any democracy has voluntarily walked away from.

Groningen taught the Netherlands, at great cost, the lesson that now shapes its energy transition: an energy system runs on consent, and consent — not molecules — is the scarcest resource underground.

You can hear Groningen in every essay on this blog. The urgency of offshore wind, the tolerance for an overfull grid, the willingness to gamble on rooftop solar in a cloudy country — all of it is easier to understand once you know the country is replacing not just an energy source, but a broken promise. The reversal of the electricity mix, where this series began, is the other side of this curve.

Figures are approximate, from NAM and EBN annual reports. Damage figures and timelines summarize the parliamentary inquiry "Groningers boven gas" (2023).

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